ATM you can buy 150mm 180 Degree Protractor Metal Angle Finder Goniometer for $7.49 (in Banggood). Just check coupons out (with price alert and history). Let’s see what best price is ATM.
Latest coupon and price update (UTC):
180 Degree Protractor Metal Angle Finder Goniometer Angle Ruler Stainless Steel Woodworking Tools Rotary Measuring Ruler – 150mm
Banggood ($7.49)
Banggood warehouse is located in China. There is no active coupon in my database right now (for Banggood). Is it a low price? Well, according to CouponsFromChina database this price is the best in history (3 records).
Link: Banggood product page
Price: $7.49
This is the best price ever noted in my database!
Exclusive Allowance Coupons: https://bit.ly/3xWgD9k and https://couponsfromchina.com/short/5cd
Aliexpress
There’re some similar (or not) items on Aliexpress
| Image | Product (link) | Price | Coupons |
|---|---|---|---|
 |
180 Degree Adjustable Protractor Metal Angle Gauge Round Head Finder Goniometer Tools Rotary Caliper Measuring Ruler 100/150mm | $4.10 | – |
Click here to search by yourself. Here are coupons that you can use.
Price history and price alert
Price history (for all/most countries) for 150mm 180 Degree Protractor Metal Angle Finder Goniometer is here.
Price records source(s): Banggood
Click on image to enlarge. 
You can set price alert (for Banggood and Aliexpress (only if product name will be the same as on Banggood and I will post it on social media though, so it’s more like Banggood price alert)).